logger = logging.getLogger('cas_provider.views')
import urllib
+import logging
+from urllib import urlencode
+import urllib2
+import urlparse
+
from django.http import HttpResponse, HttpResponseRedirect
+from django.conf import settings
+from django.contrib.auth import login as auth_login, logout as auth_logout
+from django.core.urlresolvers import get_callable
from django.shortcuts import render_to_response
from django.template import RequestContext
from django.contrib.auth import authenticate
-from django.contrib.auth import login as auth_login, logout as auth_logout
from django.core.urlresolvers import reverse
-from forms import LoginForm, MergeLoginForm
-from models import ServiceTicket
-from utils import create_service_ticket
-from exceptions import SameEmailMismatchedPasswords
+from lxml import etree
+from cas_provider.attribute_formatters import NSMAP, CAS
+from cas_provider.models import ProxyGrantingTicket, ProxyTicket
+from cas_provider.models import ServiceTicket
+
+from cas_provider.exceptions import SameEmailMismatchedPasswords
+from cas_provider.forms import LoginForm, MergeLoginForm
from . import signals
-__all__ = ['login', 'validate', 'logout']
+__all__ = ['login', 'validate', 'logout', 'service_validate']
+INVALID_TICKET = 'INVALID_TICKET'
+INVALID_SERVICE = 'INVALID_SERVICE'
+INVALID_REQUEST = 'INVALID_REQUEST'
+INTERNAL_ERROR = 'INTERNAL_ERROR'
+
+ERROR_MESSAGES = (
+ (INVALID_TICKET, u'The provided ticket is invalid.'),
+ (INVALID_SERVICE, u'Service is invalid'),
+ (INVALID_REQUEST, u'Not all required parameters were sent.'),
+ (INTERNAL_ERROR, u'An internal error occurred during ticket validation'),
+ )
-def _build_service_url(service, ticket):
- if service.find('?') == -1:
- return service + '?ticket=' + ticket
- else:
- return service + '&ticket=' + ticket
+logger = logging.getLogger(__name__)
-def login(request, template_name='cas/login.html', success_redirect='/account/', **kwargs):
+
+def login(request, template_name='cas/login.html',
+ success_redirect=settings.LOGIN_REDIRECT_URL,
+ warn_template_name='cas/warn.html', **kwargs):
merge = kwargs.get('merge', False)
logging.debug('CAS Provider Login view. Method is %s, merge is %s, template is %s.',
request.method, merge, template_name)
logging.debug('Redirecting to %s', success_redirect)
return HttpResponseRedirect(success_redirect)
else:
+ if request.GET.get('warn', False):
+ return render_to_response(warn_template_name, {
+ 'service': service,
+ 'warn': False
+ }, context_instance=RequestContext(request))
+
# Create a service ticket and redirect to the service.
- ticket = create_service_ticket(request.user, service)
+ ticket = ServiceTicket.objects.create(service=service, user=user)
if 'service' in request.session:
# Don't need this any more.
del request.session['service']
- url = _build_service_url(service, ticket.ticket)
+ url = ticket.get_redirect_url()
logging.debug('Redirecting to %s', url)
return HttpResponseRedirect(url)
def validate(request):
+ """Validate ticket via CAS v.1 protocol
+ """
service = request.GET.get('service', None)
ticket_string = request.GET.get('ticket', None)
logger.info('Validating ticket %s for %s', ticket_string, service)
if service is not None and ticket_string is not None:
+ #renew = request.GET.get('renew', True)
+ #if not renew:
+ # TODO: check user SSO session
try:
ticket = ServiceTicket.objects.get(ticket=ticket_string)
+ assert ticket.service == service
except ServiceTicket.DoesNotExist:
logger.exception("Tried to validate with an invalid ticket %s for %s", ticket_string, service)
except Exception as e:
return HttpResponse("no\n\n")
-def logout(request, template_name='cas/logout.html'):
+def logout(request, template_name='cas/logout.html',
+ auto_redirect=settings.CAS_AUTO_REDIRECT_AFTER_LOGOUT):
url = request.GET.get('url', None)
- auth_logout(request)
- return render_to_response(template_name, {'url': url}, context_instance=RequestContext(request))
+ if request.user.is_authenticated():
+ for ticket in ServiceTicket.objects.filter(user=request.user):
+ ticket.delete()
+ auth_logout(request)
+ if url and auto_redirect:
+ return HttpResponseRedirect(url)
+ return render_to_response(template_name, {'url': url},
+ context_instance=RequestContext(request))
+
+
+def proxy(request):
+ targetService = request.GET['targetService']
+ pgt_id = request.GET['pgt']
+
+ try:
+ proxyGrantingTicket = ProxyGrantingTicket.objects.get(ticket=pgt_id)
+ except ProxyGrantingTicket.DoesNotExist:
+ return _cas2_error_response(INVALID_TICKET)
+
+ pt = ProxyTicket.objects.create(proxyGrantingTicket=proxyGrantingTicket,
+ user=proxyGrantingTicket.serviceTicket.user,
+ service=targetService)
+ return _cas2_proxy_success(pt.ticket)
+
+
+def ticket_validate(service, ticket_string, pgtUrl):
+ if service is None or ticket_string is None:
+ return _cas2_error_response(INVALID_REQUEST)
+
+ try:
+ if ticket_string.startswith('ST'):
+ ticket = ServiceTicket.objects.get(ticket=ticket_string)
+ elif ticket_string.startswith('PT'):
+ ticket = ProxyTicket.objects.get(ticket=ticket_string)
+ else:
+ return _cas2_error_response(INVALID_TICKET,
+ '%(ticket)s is neither Service (ST-...) nor Proxy Ticket (PT-...)' % {
+ 'ticket': ticket_string})
+ except ServiceTicket.DoesNotExist:
+ return _cas2_error_response(INVALID_TICKET)
+
+ ticketUrl = urlparse.urlparse(ticket.service)
+ serviceUrl = urlparse.urlparse(service)
+
+ if not(ticketUrl.hostname == serviceUrl.hostname and ticketUrl.path == serviceUrl.path and ticketUrl.port == serviceUrl.port):
+ return _cas2_error_response(INVALID_SERVICE)
+
+ pgtIouId = None
+ proxies = ()
+ if pgtUrl is not None:
+ pgt = generate_proxy_granting_ticket(pgtUrl, ticket)
+ if pgt:
+ pgtIouId = pgt.pgtiou
+
+ if hasattr(ticket, 'proxyticket'):
+ pgt = ticket.proxyticket.proxyGrantingTicket
+ # I am issued by this proxy granting ticket
+ if hasattr(pgt.serviceTicket, 'proxyticket'):
+ while pgt:
+ if hasattr(pgt.serviceTicket, 'proxyticket'):
+ proxies += (pgt.serviceTicket.service,)
+ pgt = pgt.serviceTicket.proxyticket.proxyGrantingTicket
+ else:
+ pgt = None
+
+ user = ticket.user
+ return _cas2_sucess_response(user, pgtIouId, proxies)
+
+
+def service_validate(request):
+ """Validate ticket via CAS v.2 protocol"""
+ service = request.GET.get('service', None)
+ ticket_string = request.GET.get('ticket', None)
+ pgtUrl = request.GET.get('pgtUrl', None)
+ if ticket_string.startswith('PT-'):
+ return _cas2_error_response(INVALID_TICKET, "serviceValidate cannot verify proxy tickets")
+ else:
+ return ticket_validate(service, ticket_string, pgtUrl)
+
+
+def proxy_validate(request):
+ """Validate ticket via CAS v.2 protocol"""
+ service = request.GET.get('service', None)
+ ticket_string = request.GET.get('ticket', None)
+ pgtUrl = request.GET.get('pgtUrl', None)
+ return ticket_validate(service, ticket_string, pgtUrl)
+
+
+def generate_proxy_granting_ticket(pgt_url, ticket):
+ proxy_callback_good_status = (200, 202, 301, 302, 304)
+ uri = list(urlparse.urlsplit(pgt_url))
+
+ pgt = ProxyGrantingTicket()
+ pgt.serviceTicket = ticket
+ pgt.targetService = pgt_url
+
+ if hasattr(ticket, 'proxyGrantingTicket'):
+ # here we got a proxy ticket! tata!
+ pgt.pgt = ticket.proxyGrantingTicket
+
+ params = {'pgtId': pgt.ticket, 'pgtIou': pgt.pgtiou}
+
+ query = dict(urlparse.parse_qsl(uri[4]))
+ query.update(params)
+
+ uri[3] = urlencode(query)
+
+ try:
+ response = urllib2.urlopen(urlparse.urlunsplit(uri))
+ except urllib2.HTTPError as e:
+ if not e.code in proxy_callback_good_status:
+ logger.debug('Checking Proxy Callback URL {} returned {}. Not issuing PGT.'.format(uri, e.code))
+ return
+ except urllib2.URLError as e:
+ logger.debug('Checking Proxy Callback URL {} raised URLError. Not issuing PGT.'.format(uri))
+ return
+
+ pgt.save()
+ return pgt
+
+
+def _cas2_proxy_success(pt):
+ return HttpResponse(proxy_success(pt))
+
+
+def _cas2_sucess_response(user, pgt=None, proxies=None):
+ return HttpResponse(auth_success_response(user, pgt, proxies), mimetype='text/xml')
+
+
+def _cas2_error_response(code, message=None):
+ return HttpResponse(u'''<cas:serviceResponse xmlns:cas="http://www.yale.edu/tp/cas">
+ <cas:authenticationFailure code="%(code)s">
+ %(message)s
+ </cas:authenticationFailure>
+ </cas:serviceResponse>''' % {
+ 'code': code,
+ 'message': message if message else dict(ERROR_MESSAGES).get(code)
+ }, mimetype='text/xml')
+
+
+def proxy_success(pt):
+ response = etree.Element(CAS + 'serviceResponse', nsmap=NSMAP)
+ proxySuccess = etree.SubElement(response, CAS + 'proxySuccess')
+ proxyTicket = etree.SubElement(proxySuccess, CAS + 'proxyTicket')
+ proxyTicket.text = pt
+ return unicode(etree.tostring(response, encoding='utf-8'), 'utf-8')
+
+
+def auth_success_response(user, pgt, proxies):
+ response = etree.Element(CAS + 'serviceResponse', nsmap=NSMAP)
+ auth_success = etree.SubElement(response, CAS + 'authenticationSuccess')
+ username = etree.SubElement(auth_success, CAS + 'user')
+ username.text = user.username
+
+ if settings.CAS_CUSTOM_ATTRIBUTES_CALLBACK:
+ callback = get_callable(settings.CAS_CUSTOM_ATTRIBUTES_CALLBACK)
+ attrs = callback(user)
+ if len(attrs) > 0:
+ formater = get_callable(settings.CAS_CUSTOM_ATTRIBUTES_FORMATER)
+ formater(auth_success, attrs)
+
+ if pgt:
+ pgtElement = etree.SubElement(auth_success, CAS + 'proxyGrantingTicket')
+ pgtElement.text = pgt
+
+ if proxies:
+ proxiesElement = etree.SubElement(auth_success, CAS + "proxies")
+ for proxy in proxies:
+ proxyElement = etree.SubElement(proxiesElement, CAS + "proxy")
+ proxyElement.text = proxy
+
+ return unicode(etree.tostring(response, encoding='utf-8'), 'utf-8')
fnp / django-cas-provider.git / blobdiff